Formation Mechanism, Evolution and Modification of Non-Metallic Inclusions in Al-killed, Ti-Alloyed Steel Melt: A Review

Pindar, Sanjay; Pande, Manish

doi:10.1007/s12666-023-02947-9

Cited by 3 publications

(2 citation statements)

References 117 publications

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“…) A relationship between Si and O content was obtained using Eq. ( 4), substituting the interaction parameters (Table 5) 8,[33][34][35][36] and silica activity values. The silica activity was taken as one for high-purity silicon (HPS) addition experiments (that is, for the Fe-Si-O system).…”

Section: Thermodynamic Analysismentioning

confidence: 99%

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Influence of Ferrosilicon Addition on Silicon-oxygen Equilibria in High-silicon Steels

Pindar,

Pande

2024

ISIJ Int.

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The role of impurities introduced to the steel melt through ferrosilicon addition is of considerable importance in determining the steel cleanness of Si-killed, Si-alloyed steel grades. The silicon requirement is often met with FeSi addition at the industrial scale. In the present study, a detailed investigation of commercial purity ferrosilicon (FeSi) alloy has been conducted to assess its impurity content. Aluminium and titanium were found to be the main impurities among others. Si-O equilibria in liquid steel has been established at 1873 K using FeSi alloy for a wide range of silicon concentration to examine the influence of its impurities. The actual Si-O equilibria established through FeSi addition was compared with true Si-O equilibria which was established using Highpurity silicon (HPS) addition. It has been observed that impurities (mainly aluminium and titanium) from FeSi perturbed the true Si-O equilibria. Thermodynamic and kinetic considerations pertaining to this deviation have been elaborated in the present study.

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Section: Thermodynamic Analysismentioning

confidence: 99%

“…( 3)) has been extended to a multi-component system by including the additional solute terms (Al, Ti). The first and second-order interaction parameters adopted from our previous study 8) and literature [33][34][35][36] are given in Table 5.…”

Section: Thermodynamic Analysismentioning

confidence: 99%

Influence of Ferrosilicon Addition on Silicon-oxygen Equilibria in High-silicon Steels

Pindar,

Pande

2024

ISIJ Int.

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Investigation of Inclusion Characteristics in Ferrosilicon Killed High Silicon Steels

Pindar,

Pande

2024

steel research int.

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Industrially, the silicon requirement of liquid steel is often met with ferrosilicon (FeSi) instead of high‐purity silicon addition. FeSi, a silicon‐rich alloy, contains impurities typically inherited from its manufacturing stage. Therefore, FeSi addition results in the formation of complex inclusions in the liquid steel. Herein, a detailed inclusion characterization of the samples obtained from the melting experiments for a wide range of silicon concentrations has been carried out to examine the effect of FeSi impurities. Pure silica inclusions evolve to silica‐ and/or alumina‐based Si–Al–(Ti)–O–(TiN) complex inclusions with the increasing addition of FeSi to the steel melt. Reduction of silica by aluminum or titanium, the presence of titanium in the steel melt, and/or TiN inclusions formed at the periphery of oxide inclusions restrict the growth of oxide inclusions, resulting in small‐sized (average) oxide inclusions. The underlying mechanism of such complex (Si–Al–Ti–O–N)‐based inclusions has been explained with the aid of microstructural characterization and thermodynamic calculations. Moreover, the steel–crucible (alumina) interface has also been investigated for inclusion deposits and crucible–steel interaction.

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Influence of Silicon Source on the Steel Cleanness

Pindar,

Pande

2023

Proceedings of the International Conference on Metallurgical Engineering and Centenary Celebration

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Formation Mechanism, Evolution and Modification of Non-Metallic Inclusions in Al-killed, Ti-Alloyed Steel Melt: A Review

Cited by 3 publications

References 117 publications

Influence of Ferrosilicon Addition on Silicon-oxygen Equilibria in High-silicon Steels

Influence of Ferrosilicon Addition on Silicon-oxygen Equilibria in High-silicon Steels

Investigation of Inclusion Characteristics in Ferrosilicon Killed High Silicon Steels

Influence of Silicon Source on the Steel Cleanness

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